Wind Turbine Payback in Steele County, MN
Wind turbine payback in Steele County
No. The turbine wears out before it pays for itself.
At 30 m, the height a home turbine tower usually reaches, the wind in Steele County, MN averages 6.45 m/s (14.4 mph). A 10 kW turbine there would make about 23,038 kWh a year, worth $3,787 at MN's 16.44¢/kWh. Against an installed cost of about $100,000, that is a payback of 26 years, and the turbine is built to last about 20.
What to do in Steele County
A home turbine is not worth buying for savings in Steele County unless your spot is far windier than the county average, 7.5 m/s at the hub against 6.45 m/s here. Per kW, solar panels would make about 1,127 kWh a year here against the turbine's 2,304, so get a solar quote first.
What would have to change
- Power would have to cost 22¢/kWh, 1.3 times what MN pays now.
- Or the average wind at the hub would have to be 7.5 m/s instead of 6.45. A taller tower or an exposed ridge can add some of that; a rooftop never will.
Against the rest of MN
Steele County is the 257th windiest of 3,144 US counties at turbine height; the national middle is 4.79 m/s. The windiest in MN is Lincoln County at 6.68 m/s, payback 25 years.
Month by month in Steele County
April is the strongest month here, at 7.16 m/s and about 2,315 kWh. August is the weakest, 5.25 m/s and 1,209 kWh, so the best month makes 1.9 times the worst. November to March brings in 46% of the year's output in Steele County.
| Month | Wind at 30 m | Output | Worth |
|---|---|---|---|
| January | 6.91 m/s | 2,240 kWh | $368 |
| February | 6.90 m/s | 2,018 kWh | $332 |
| March | 6.89 m/s | 2,229 kWh | $366 |
| April | 7.16 m/s | 2,315 kWh | $381 |
| May | 6.56 m/s | 2,023 kWh | $333 |
| June | 5.96 m/s | 1,592 kWh | $262 |
| July | 5.27 m/s | 1,225 kWh | $201 |
| August | 5.25 m/s | 1,209 kWh | $199 |
| September | 6.32 m/s | 1,816 kWh | $299 |
| October | 6.73 m/s | 2,129 kWh | $350 |
| November | 6.83 m/s | 2,125 kWh | $349 |
| December | 6.66 m/s | 2,085 kWh | $343 |
What a taller tower would buy
Measured at 10 m the wind in Steele County averages 5.1 m/s; at 50 m it is 7.19 m/s. That gives a shear exponent of 0.213, typical of ordinary open country. Going from 20 m to 50 m takes output from 19,076 to 28,390 kWh a year, 49% more, before counting the extra cost of the taller tower. Why tower height decides it explains the shear behind these numbers.
| Hub height | Average wind | Output | Payback |
|---|---|---|---|
| 20 m | 5.92 m/s | 19,076 kWh | 32 years |
| 30 m | 6.45 m/s | 23,029 kWh | 26 years |
| 40 m | 6.86 m/s | 26,009 kWh | 23 years |
| 50 m | 7.19 m/s | 28,390 kWh | 21 years |
Counties around Steele County
None of the 6 closest counties is windier than Steele County.
- Dodge County, MN: 6.45 m/s, 23,038 kWh, payback 26 years (17 mi)
- Waseca County, MN: 6.38 m/s, 22,521 kWh, payback 27 years (18 mi)
- Rice County, MN: 6.17 m/s, 20,965 kWh, payback 29 years (24 mi)
- Freeborn County, MN: 6.43 m/s, 22,891 kWh, payback 27 years (24 mi)
- Mower County, MN: 6.37 m/s, 22,447 kWh, payback 27 years (33 mi)
- Le Sueur County, MN: 6.23 m/s, 21,410 kWh, payback 28 years (35 mi)
Sun versus wind in Steele County
Steele County gets 3.86 kWh of sunshine per square metre a day on average. One kW of solar panels here would make roughly 1,127 kWh a year; one kW of the turbine above makes 2,304. This is one of the rare places where a kilowatt of turbine out-produces a kilowatt of panels, by 2.0 times. Panel output assumes an 80% system performance ratio. Wind or solar runs the same comparison for every county.
How this is worked out
Wind is NASA's Power climate record, the 2001-2025 average at 10 m and 50 m for the county's centre, carried to 30 m with this county's own measured wind shear and spread into hours with a Rayleigh distribution. The turbine is a generic 10 kW, 7 m rotor machine with 10% losses. Cost is $10,000 per kW installed with no tax credit, because the federal one ended in 2025. One county-centre number cannot see your hilltop or your tree line, so treat it as the starting point for a site survey, not a substitute. The full method and its weak spots are in how the numbers are made.